Take off your headphones and listen WAIT UNTIL IT'S SAFE TO CROSS If traffic is coming, let it pass LOOK AND LISTEN AGAIN When it's safe, walk straight across the road ARRIVE ALIVE Keep looking and listening for traffic and don't use your smartphones and music as you cross As I've always said: people need to use the Green Cross Code because I won't be there when they cross the road.
In drills of this kind, the submarine's officers are supposed to use caution, first coming slowly to the surface, listening for traffic with sonar equipment and scanning the horizon for miles around through a periscope before submerging and quickly resurfacing, Navy officials in Washington and Hawaii said.
For instance, every http and www server in the world is constantly listening for traffic assigned to port number 80.
Think of these networking ports as doors a local server, near your own computer, is constantly listening for traffic (packets of data) that specifies particular port numbers.
Although some locations now have signals indicating walk cycles, 18 in many locations blind people still cross the street by listening for traffic, explains Deborah Kent Stein of the National Federation of the Blind (NFB).
Idle listening is the first source; this is where a node is kept in a state wakefulness so that it can actively listen for any traffic that may or may not be present.
Remember to listen for oncoming traffic, just because you don't see a car, doesn't mean it's not coming.
"I'm inclined to agree with him because that closes up your ears, and you need your ears to work to listen out for traffic," says Macdowall.
Port scanning is another process that reveals the TCP ports on which a host is listening for Internet traffic.
They have learned how to negotiate traffic, listen for human voices and eat rats.
In addition, the network can listen for different types of traffic from many of these devices and recognize a pattern.
